Injector



(Model.)

T. J. HART. INJEGTOR.

Patented Oct.' 13, 1891.

mx: l

UNITED STATES THOMAS J. HART, OF BUFFALO, NEV YORK, ASSIGNOR TO THESHERVVOOD PATENT OFFICE.

MANUFACTURING COMPANY, OF SAME PLACE.

INJECTOR.

SPECIFICATION forming part of Letters Patent No, 461,197, dated October1.8, 1891. Application iled March 5, 1891. Serial Nn. 383,902. (Model.)I

' To all whom, it muy concern:

Be it known that I, THOMAS J. HART, a citizen of the United States,residing at Buffalo, in the county of Erie and State of New York,

have invented new and useful Improvements in Injectors, of which thefollowing is a specification.

This invention relates to that class of injectors commonly7 known asrestarting in- Io jectors, in which the injection of water isautomatically resumed when the tlow of Water has been interrupted fromany cause.

My invention has the object to provide a valve mechanism by `which thewater-valve x 5 and the steam-valve are operated simultaneously,wherebythe supply ot' water to the injector is at all times proportionate tothe steam-supply.

Another object of my invention is to provide ready means of escape forthe water which collects in the vacuum-chamber.

In the accompanying drawings, Figure 1 is a longitudinal sectionalelevation of an inj ector provided with my improvements. Figs.

2 and 3 are vertical transverse sections in lines 0c :c and y y, Fig. l,respectively.

Like letters of reference refer to like parts in the several figures.

A represents the main shell or casing of 3o the injector, which ispreferably cast in one piece in the usual manner.

B represents the steam-inlet pipe which connects with the steam-chamberb, formed in the front portion of the casing, and b is a 3 5 screw-plugclosing the outer end of the steamchamber. Y

O represents the water-inlet pipe connected `with the Water-chamber O',formed behind the steam-chamber and separated from the 4o latter by adiaphragm d.

D represents a screw-plug arranged in a threaded opening formed in thediapragm d andprovided with a central steam-passage c.

The front end of the plug D is provided with a valve-seat f, and itsrear end is provided with a steam-nozzle F.

1 Grepresents the steam-valve arranged in -ffront of the valve-seat fand adapted to bear Yagainst the same,whereby the supply of steam 5o tothe nozzle F-is controlled. This valve is Vin the usual manner.

secured to the inner end of a valve-stem g,

vwhich latter passes through the screw-plug b and is provided on itsouter end with a handle g', whereby the valve-stem may be turned. `Theinner portion of the valve-stem' 55 is provided with a screw-threadedport-ion g2,

which engages in a screw-thread g3, formed in the'plug, so that thevalve G is moved toward and from its seat by turning thehandle g in theproper direction. The inner end of 6o the steam-valve is provided withwings h, arranged in an enlargement of the steam-passage c, whereby thesteam-valve is guided in the usual manner.

l represents the vacuum-chamber formed in the' casing behind thewater-chamberand separated from the latter by a diaphragm t'. l

J represents the suction-tube having an external screw-thread engagingin a threaded opening formed in the diaphragm t' and pro- 7'o vided witha conical passage K, arranged axially in line with the passage e of thesteamnozzle.

K represents the rear wall of the vacuumchamber, and K2 is a cylinderextending rear- 75 wardly from the rear wall of the vacuumchamber.

L represents a sleeve arranged in the cylinder and containing thecombining and delivery tubes of the injector. The combin'ing- 8o tube Mis formed in the front portion of the sleeve L and receives the steamand water from the suction-tube, and the delivery-tube M is arranged inrear ofthe combining-tube The combining and delivery tubes are arrangedaxially in line with the steamnozzle and suction-tube. The front end ofthe sleeve L is contracted, so as to form a shoulder l, which [itsagainst a corresponding shoulder formed in the adjacent 9o y portion ofthe cylinder, and the rear end of the sleeve is provided with an annularange m, which bears against the rear end of the cylinder.

secured to the end of the cylinder by means of a screw-threadedcoupling-collar n.

o represents an overflow-opening, formed, preferably, at the junction ofthe combining and-delivery tubes and registering with an opening o',formed in the upper side of the cylinder, through which the excess ofwater is discharged from the injector.

P represents an overflow-chamber, into which the excess of water isdischarged. This chamber is formed by enlarging the shell of theinjector so as to form a valve-chamber above the cylinder-opening o andtwo delivery-passages o2,leading from said valve-chainber downwardly onopposite sides of the cylinder to an overflow-pipe 03.

p represents an overiow-valve, which permits the escape of water fromthe combining and delivery tubes, but prevents the ingress of air. Thisvalve is arranged in the valvechamber-and bears against the opening o inthe top of the cylinder when in a normal position, thereby preventingthe ingress of air into the injector. The overiow-Valveis provided witha stem p', which is guided in a screw-plug q, closing the upper end ofthe valve-chamber.

r represents a hollow bridge-piece extending lengthwise across the lowerportion of the overflow-chamber, and r is a passage extending from thelower side of the vacuum-cham-` ber to the hollow bridge-piece, wherebythe water collecting in the vacuum-chamber is conducted into the hollowbridge-piece.

'r2'is an opening-formed in the upper side of the bridge-piece, throughwhich the water collecting in the latter escapes into theoverfiow-chamber. The water from the vacuumchamber accumulates in thehollow bridgevpiece untilthe latter is filled. When the; water riseshigher than the opening in the top of the bridge-piece, the surplusescapes;

but the bridge-piece always remains filled with water, thereby formingaluting or water seal which prevents the admission of airinto thevacuum-chamber. v

R represents a valve, whereby the admission of air into thevacuum-chamber is positively prevented. This valve bears against avalve-seat formed vin the bridge-piece openingri, and is provided with adepending stem- -guided in a lugformed on the lower side of thebridge-piece.

The water in rising in the hollow bridgepiece and the vaeu u m-passageraises the valve R until the excess is permitted to escape, when thevalve seats itself:` again. Heretofore the water collecting in thevacuum-chamber would rise and obstruct the passage of j the steam andwater from the suction-tube to the combining-tube, thereby impairing theeffectiveness of the injector. -By employing a water trap or seal thewater collecting in the vacunm-chamberis automatically drained bygravity into the overflow-chamber, thereby preventing the accumulatingwater from interfering with the working of the injector.

vided below the overflow-opening o with an opening r3 to permit thevacuum-valve R to be placed in posit-ion. In assembling the parts thevalve R is passed through the top of the overliow-chamber, thencethrough the openings o rof the cylinder, and then placed upon thevalve-seat of the opening in the bridge-piece. The sleeve containing thecombining and delivery tubes is next placed in the cylinder, so that theoverliow-opening ot'v the sleeve is arranged on top, thereby closing theopening r3 in the bottom of the cylinder. The vflange of the sleeve isprovided with a pin r4, which engages in a recess in the end ot thecylinder, thereby retaining the sleeve in its proper position.

S represents the valve whereby the supply of water to the suction-tubeis regulated. This valve consists of a conical sleeve mounted on therear end of the steam-nozzle and capable of moving toward and from theend of the suction-tube, thereby decreasing or increasing the spacebetween the water-valve and the front end of the suction-tube.

T represents a valve-rod,whereby the watervalve is operated. This rod isarranged to slide lengthwise-in a guiding-lug t, formed underneath thesteam-chamber, and has its rear end arranged in the water-inlet pipe.

t represents a connecting-arm, whereby the water-valve is connected withthe valve-rod. This arm extends vertically from the valverod in thewater-inlet pipe into the Waterchamber and is provided at its lower endwith a screw-threaded opening which receives the externally-threadedrear end of the valve-rod. The upper end of the connecting-arm isbifurcated and engages in an annular groove t2, formed in the outer sideof the water-valve.

U represents a yoke, whereby the valve-rod of the water-valve isconnected with the stem of the steam-valve. This yoke is secured withits lower end tojthe front end of the valve-rod and provided at itsupper end with a bifurcation which embraces the stem of the steam-valveand is held against lengthwise movement thereon between thehandle g anda shoulder u, formed on the valve-stem'.

In assembling the parts the upper end ofv IOO IIO

water-valve, and the valve-rod is screwed into l the lower end of thearm until the water-valve has been adj usted to its properrelativeposition with reference to the steam-valve. The front end of thevalve-rod is then secured to the yoke which connects the water-valve rodto the stem of the steam-valve.-

By turning the handle in the proper direction the steam-valve recedesfrom its seat and admits steam into the nozzle. During the lengthwisemovement of the steam-valve and its stem the water-valve is opened,owing to the yoke connecting the water-valve rod with the steam-valvestem, thereby actuating the water-valve simultaneously withthesteamvalve at all times. The movement of the IZO and preventing anexcessive supply of water,

which is liable to take place in using a Watervalve which is operatedindependently of the steamvalve- The vsimultaneous closing of theWater-valve with the steam-valve is particularly desirable when water issupplied to the injector under pressure, in which case water is oftenforced through the injector after the steam-valve has been closed byneglecting to close 'the watervalve.

The steam issuing from the nozzle passes through the suction-t ube,combining-tube,and the overflow-opening and raises the overflow- Valve,which permits it to escape into the atmosphere until the vacuum createdin the vacuum-chamber has drawn the water into the suction-pipe. Vaterand steam continue to pass into the overflow-chamber until the supply ofwater is properly proportioned to the steam, when the overfiow-Valvecloses and the steam and Water are discharged through the delivery-pipe.

I claim as my inventionl. In an injector, the combination, with thesteam-nozzle, of a waterva1ve adapted to slide on said nozzle, an armengaging said valve and depending into the Water-inlet pipe, and avalve-rod having its rear end arranged in the Water-inlet pipe andengaging with said arm, substantially as set forth.

2. The combination, with the steam-nozzle, the steam-valve, and itsstem, of a water-suction tube, a water-valve arranged to slide on thesteam-nozzle, a valverod, an arm connecting one end of the valve-rodwith the water-valve, and a yoke connecting the opposite end of thevalve-rod with the steam-valve' stem,substantially as set forth.

3. The combination7 with the steam-chain` ber and the steam-nozzle, of asteam-valve arranged in said steam-chamber, a rotating Valve-stemattached with its rear end to said steam-valve and having its front endarranged outside of the steam-chamber, a Waterphamber and water-inletpipe, a suction-tube communicating-With said Water-chamber, a slidevalvearranged on the steam-nozzle and controlling the supply of water to saidsuctiontube, a sliding valve-rod having its screwthreaded rear endarranged insaid Waterchamber and its front end arranged outside of theWater-chamber, an arm having a screwthreaded opening at one end engagingwith the screw-threaded end of said valve-rod and provided at itsopposite end with a bifurcation which engages with an annular groove insaid water-valve, anda yoke connecting the front ends of the steam-valvestem and the water-valve rod, substantially as set forth.

4:. The combination,with the vacuum-chamber and the overiiow-chamber, ofa hollow bridge-piece arranged in said overiioW-chamber and having anopening communicating with the overflow-chamber, and a descendingpassage leading from the lower side of the vacuum-chamber to thebridge-piece, whereby the water collecting in the vacuum-chamber iscondu cted to the bridge-piece and thence to the overflow-chamber,substantially as set forth.

5. The combinationfvvith the vacuum-chamber and the overiioW-chamber, of`a hollow bridge-piece arranged in'said overflow-charnber and having anopening in its t'op leading into the overflow-chamber, and a passageleading from the vacuum-chamber to the hollow bridge-piece, whereby thewater collecting in the bridge-piece forms'a Water seal for thevacuum-chamber, substantially as set forth.

6. The combination,with the vacuum-chamber and the overflow-chamber, ofa hollow bridge-piece arranged in the overflow-cham-` ber and providedin its top with an opening leading into the overflow-chamber, a passageleading from the bottom of the vacuum-chamber to said bridge-piece, anda valve arranged in the opening of the bridge-piece, substantially asset forth.

7. The combination,with the overflow-chamber, of a bridge-piece providedwith a valve in its top, a cylinder arranged in the overIioW- chamberabove said bridge-piece and provided with an opening arranged over saidvalve and extending vertically through said cylinder, through whichopening said valve can be introduced, and a removable sleeve arranged insaid cylinder and containing the combining and delivery tubes,substantially as set forth.

/Vitn'ess my hand this 2d day of March,

j Trios. J. HART.

Witnesses:

a JNO. J. BoNNER,

FRED. C. GEYER.

IOO

